Pac-Man was released on May 22, 1980 by Midway The game was developed by Namco, Pac-Man is a puzzle game.

The game was developed primarily by a young Namco employee named Toru Iwatani over the course of a year, beginning in April 1979, employing a nine-man team.

Pac-Man is a puzzler game where the player tries to the gather up all the food dots. Four enemies (Blinky, Pinky, Inky and Clyde) roam the maze, trying to catch Pac-Man. If an enemy touches Pac-Man, he loses a life. Whenever Pac-Man occupies the same tile as an enemy, he is considered to have collided with that ghost. When all lives have been lost, the game ends.

Near each corner are larger flashing dots. These power up the player who can now kill the enemies who are fleeing. The eyes of an eaten enemy return to the center where it is respawned. Enemies flash when the power up is nearly done.

In later stages, the enemies go straight to flashing, bypassing blue, which means that they can only be eaten for a short amount of time, although they still reverse direction when a power pellet is eaten; in even later stages, the ghosts do not become edible (i.e., they do not change color and still make Pac-Man lose a life on contact), but they still reverse direction.

Despite the seemingly random nature of the enemies, their movements are strictly deterministic, which players have used to their advantage. Many players could play this game for several hours before a bug int he game put an end to the play. This bug occurs at the 256th board, where it will cause an overflow in the 8-bit byte distinct values. As a result, the final board is almost unplayable, with the right half replaced by a series of scrambled symbols, garbage tiles, and letters.

The game also has a bug that limits how much you can play for one quarter. When the level reaches 256 the game malfunctions.

The stock game awards a bonus life for 10,000 points but there are DIP switches to change it or disable it.

The machine logic board uses a Z80 CPU with a 16 color 224×288 CRT monitor. More than 350,000 machines were made and sold for $2400 each. This game was so popular that many of these remain in arcades for more than a decade after they were introduced.